PR libstdc++/57641

	* include/std/mutex (timed_mutex, recursive_timed_mutex): Move common
	functionality to new __timed_mutex_impl mixin. Overload try_lock_until
	to handle conversion between different clocks. Replace constrained
	__try_lock_for_impl overloads with conditional increment.
	* include/std/shared_mutex (shared_mutex::_Mutex): Use the new mixin.
	* testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200180 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 69 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/30_threads/timed_mutex/try_lock_until/57641.cc b/libstdc++-v3/testsuite/30_threads/timed_mutex/try_lock_until/57641.cc
new file mode 100644
index 00000000000..94fe5b32761
--- /dev/null
+++ b/libstdc++-v3/testsuite/30_threads/timed_mutex/try_lock_until/57641.cc
@@ -0,0 +1,69 @@
+// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } }
+// { dg-options " -std=gnu++0x -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* powerpc-ibm-aix* } }
+// { dg-options " -std=gnu++0x -pthreads" { target *-*-solaris* } }
+// { dg-options " -std=gnu++0x " { target *-*-cygwin *-*-darwin* } }
+// { dg-require-cstdint "" }
+// { dg-require-gthreads-timed "" }
+
+// Copyright (C) 2013 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <mutex>
+#include <chrono>
+#include <thread>
+#include <testsuite_hooks.h>
+
+// PR libstdc++/57641
+
+namespace C = std::chrono;
+
+// custom clock with epoch 10s before system_clock's
+struct clock
+{
+  typedef C::system_clock::rep rep;
+  typedef C::system_clock::period period;
+  typedef C::system_clock::duration duration;
+  typedef C::time_point<clock> time_point;
+  static constexpr bool is_steady = C::system_clock::is_steady;
+
+  static time_point
+  now()
+  {
+    auto sys_time = C::system_clock::now().time_since_epoch();
+    return time_point(sys_time + C::seconds(10));
+  }
+};
+
+std::timed_mutex mx;
+bool test = false;
+
+void f()
+{
+  test = mx.try_lock_until(clock::now() + C::milliseconds(1));
+}
+
+int main()
+{
+  bool test = false;
+  std::lock_guard<std::timed_mutex> l(mx);
+  auto start = C::system_clock::now();
+  std::thread t(f);
+  t.join();
+  auto stop = C::system_clock::now();
+  VERIFY( (stop - start) < C::seconds(9) );
+  VERIFY( !test );
+}